Charles M. Schulz - Sonoma County in August 2024

83.4%departed on time

BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report.

In August 2024, reporting carriers scheduled 338 domestic departures from Charles M. Schulz - Sonoma County (STS). 83.4% left less than 15 minutes late and 77.5% reached their destination on time; 0.0% were cancelled.

Nationally that month, 75.4% of flights departed on time and 74.7% arrived on time, so STS departures were 8.0 points above the national departure figure.

A year earlier, in August 2023, the airport had 315 departures with 83.2% leaving on time: a change of +0.2 points, with flights up 7%.

Flights arriving at STS that month were on time 79.2% of the time (337 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 50%, air carrier 24% and national aviation system 21%.

On time 77.5%
Arrived 15+ minutes late 22.2%
Cancelled 0.0%
Diverted 0.3%

Every scheduled departure from STS in August 2024, judged by arrival at the destination.

August 2024 against a year earlier, the airport's year and the nation

Measure	Aug 2024	Aug 2023	STS, 12 months to Jul 2026	All reported flights, Aug 2024
Departed on time	83.4%	83.2%	80.4%	75.4%
Arrived on time	77.5%	79.7%	78.8%	74.7%
Cancelled	0.0%	0.3%	1.7%	2.1%
Average departure delay (late minutes only)	8.6 min	12.1 min	13.2 min	18.4 min
Scheduled departures a day	11	11	16	20,634
Scheduled departures	338	315	5,714	619,025

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	238	70%	82.4%	2.7 min	0.0%
AS Alaska Airlines	42	12%	57.1%	12.2 min	0.0%
AA American Airlines	31	9%	64.5%	21.4 min	0.0%
MQ Envoy Air	27	8%	81.5%	3.5 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
STS–SAN	Santa Rosa to San Diego	62	75.8%	6.9 min	0.0%
STS–SEA	Santa Rosa to Seattle	61	65.6%	8.9 min	0.0%
STS–LAX	Santa Rosa to Los Angeles	60	91.7%	-2.1 min	0.0%
STS–SNA	Santa Rosa to Santa Ana	58	86.2%	1.7 min	0.0%
STS–DFW	Santa Rosa to Dallas/Fort Worth	31	64.5%	21.4 min	0.0%
STS–PHX	Santa Rosa to Phoenix	31	83.9%	3.0 min	0.0%
STS–BUR	Santa Rosa to Burbank	23	65.2%	10.7 min	0.0%
STS–PDX	Santa Rosa to Portland	12	75.0%	-1.1 min	0.0%

By scheduled departure hour

100

On-time share:under 62%6270768288% and over

Share of departures that left less than 15 minutes late, by scheduled hour (local time), August 2024.

Delay causes

BTS cause category	Share of delay minutes	National, Aug 2024	Minutes
Air carrier	24.4%	33.8%	792
Late-arriving aircraft	49.6%	39.8%	1,610
National Aviation System	21.4%	20.4%	696
Extreme weather	3.2%	5.9%	104
Security	1.4%	0.1%	44

3,246 delay minutes on 75 flights that arrived 15 or more minutes late and carried a cause report. Carriers assign the categories; see what each category means.

Questions and answers

How many flights left STS on time in August 2024?

83.4% of 338 scheduled domestic departures left less than 15 minutes late, and 77.5% reached their destination on time. The national figures that month were 75.4% and 74.7%.

How does that compare with a year earlier?

In August 2023, 83.2% of 315 departures left on time and 0.3% were cancelled, against 83.4% and 0.0% in August 2024.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for August 2024; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for STS · methodology · corrections.